African Black-Bellied Seedcracker Finches Have Beaks That Are Either Large

question 23

Multiple Choice

African black-bellied seedcracker finches have beaks that are either large or small.Only large-beaked birds can crack open hard seeds,and small-beaked birds are more adept at handling small seeds.Both have an advantage over intermediate-sized beaks.This is an example of a response to:

• A)directional selection.
• B)stabilizing selection.
• C)disruptive selection.
• D)sexual selection.

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